In what looks like something straight out of a Sci-Fi movie, an intrepid hiker has captured an image of what could easily be mistaken by conspiracy theorists as a UFO hovering over a volcano in Russia.

But, in actual fact, Ivan Dementievskiy, snapped a rare cloud formation settling over the volcano at Klyuchevskaya Sopka in Russia to create what looked like a huge hat.

This type of cloud is called a lenticular, and is formed when moist air flows over mountains.

According to The Sun, Ivan said: 'The sky suddenly seemed to open up and this weird shape appeared.'